The screen adaption of the manga Alita: Battle Angel, directed by Robert Rodriguez and produced by James Cameron who also wrote the screenplay, is supposed to be released with a PG-13 rating in the US. At least, that is what Rodriguez said at Comic Con Experience in Brazil. He also explain in the sci-fi genre, there are more options because it is an unrealistic scenario. The question how violent Alita: Battle Angel actually is will be answered soon.